<svg xmlns="http://www.w3.org/2000/svg">
  <!-- First row -->
  <g transform="translate(20,20)">
    <g>
      <rect width="15px" height="15px"/>
    </g>
    <g transform="translate(50,0)">
      <rect x="0" y="10" width="15px" height="15px"/>
    </g>
    <g transform="translate(100,0)">
      <rect x="12" y="10" width="15px" height="15px"/>
    </g>
  </g>
  <!-- Second row -->
  <g transform="translate(20,70)">
    <g>
      <rect x="30" y="10" width="15px" height="15px"/>
    </g>
    <g transform="translate(50,0)">
      <rect x="35.76" y="17.68" width="15px" height="15px"/>
    </g>
    <g transform="translate(100,0)">
      <rect x="48" y="34"  width="15px" height="15px"/>
    </g>
  </g>
  <!-- Third row -->
  <g transform="translate(20,120)">
    <g>
      <rect x="50.4" y="37.2" width="15px" height="15px"/>
    </g>
    <g transform="translate(50,0)">
      <rect x="60" y="50" width="15px" height="15px"/>
    </g>
    <g transform="translate(100,0)">
      <rect x="60" y="50" width="15px" height="15px"/>
    </g>
  </g>
</svg>
